Which term refers to the increase in body size over time?

The term that is most accurately associated with the increase in body size over time is growth. Growth specifically refers to the quantitative changes in physical size, such as an increase in height, weight, and overall body mass. This process is typically measured and is a fundamental aspect of biological development, particularly in childhood and adolescence when significant physical changes occur.

In contrast, development encompasses a broader range of changes, including physiological, psychological, and social aspects, and does not solely focus on physical size. Progression implies a forward movement or advance in a particular process, which does not directly relate to body size. Maturation refers to the process of becoming mature or fully developed, which can include growth but also encompasses various other changes beyond size. Therefore, growth is the most precise term in this context, as it directly speaks to the increase in size that occurs over time.